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CPT 20611: Ultrasound-Guided Arthrocentesis of Major Joint or Bursa

CPT code 20611 covers ultrasound-guided arthrocentesis of a major joint or bursa with permanent recording and reporting. The code captures both diagnostic aspiration of synovial fluid and therapeutic joint injection when performed with imaging guidance, and it is used across ambulatory and hospital outpatient settings. Nationally, accurate coding for image-guided joint procedures matters for quality documentation, appropriate reimbursement, and capturing utilization of ultrasound-assisted musculoskeletal care. Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will learn what CPT code 20611 represents clinically and operationally, how it differs from non-image-guided arthrocentesis, common sites of service, and which payers apply coverage and billing policies to this service. The publication summarizes typical use cases (shoulder, hip, knee, subacromial bursa), the importance of permanent ultrasound recording and reporting for the code, and the policy context affecting coverage and documentation expectations. Data not available in the input for associated taxonomies, ICD-10 diagnoses, and related codes.

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Billing Code Overview

CPT code 20611 describes an arthrocentesis of a major joint or bursa with ultrasound guidance and permanent recording. In this procedure, a provider inserts a needle through the skin into a major joint or bursa—commonly the shoulder, hip, knee, or subacromial bursa—to remove synovial fluid for diagnostic testing or to inject therapeutic medication. The service specifically includes the use of ultrasound guidance with permanent recording and reporting.

Service type: Image-guided joint aspiration/injection (arthrocentesis) with permanent ultrasound documentation.

Typical site of service: Outpatient clinic, physician office, outpatient surgery center, or hospital outpatient department, as these settings commonly perform image-guided joint aspirations and injections.

Data not available in the input for: associated taxonomies, ICD-10 diagnoses, and related codes.

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CPT 20611: Ultrasound-Guided Arthrocentesis of Major Joint or Bursa

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Billing Code Overview

Service type: Image-guided joint aspiration/injection (arthrocentesis) with permanent ultrasound documentation.

Data not available in the input for: associated taxonomies, ICD-10 diagnoses, and related codes.

Clinical & Coding Specifications

Clinical Context

A 62-year-old patient presents to an outpatient orthopedics clinic with acute onset of progressive right knee swelling, pain, and limited range of motion for three days. The patient reports difficulty bearing weight and subjective fever. Physical exam demonstrates an effusion with warmth and tenderness. Point-of-care ultrasound confirms a large suprapatellar joint effusion. The provider discusses arthrocentesis, obtains informed consent, and prepares sterile supplies and ultrasound equipment. Under ultrasound guidance with permanent recording, the provider inserts a needle into the knee joint, aspirates synovial fluid for cell count, Gram stain, culture, and crystal analysis, and documents fluid appearance, volume, and immediate patient response. If indicated, the provider injects a corticosteroid for therapeutic relief. Specimen labeling, chain-of-custody, and requisitions are completed, and post-procedure aftercare instructions are provided. Typical sites of service include outpatient clinic, urgent care clinic, emergency department, and hospital inpatient bedside. The service type is image-guided diagnostic and/or therapeutic arthrocentesis of a major joint or bursa using ultrasound with permanent recording and reporting, consistent with 20611.

Coding Specifications

Modifier	Description	When to Use
`25`	Significant, separately identifiable E/M service by the same physician on the same day	Use when a distinct evaluation and management visit is performed the same day as the procedure and documented separately.
`59`	Distinct procedural service	Use when this arthrocentesis is separate and not part of another service on the same day (select carefully per NCCI).
`76`	Repeat procedure by same physician	Use when the same procedure is repeated later the same day by the same provider.
`77`	Repeat procedure by another physician	Use when the same procedure is repeated by a different physician the same day.
`26`	Professional component	Use if billing separates the professional component when the facility bills technical component (rare for office-performed procedures).
`TC`	Technical component	Use if only the technical component is billed by the facility or imaging service (applicable when ultrasound recorded by another entity).
`59` (alternative)	Modifier `XU` (Unusual non-overlapping service)	Use `XU` only where applicable and supported by payer policy to indicate distinct service (use per payer guidance).
`52`	Reduced services	Use when the procedure is partially reduced or not completed as documented.
`53`	Discontinued procedure	Use when the procedure is started but discontinued due to extenuating circumstances.
`22`	Increased procedural services	Use when the work required is substantially greater than typical and well-documented.
`JZ`	Zero days of observation/hospital inpatient only	Use per payer rules when applicable to observation status billing (payer-specific).
`LT`	Left side	Use to indicate laterality when required by payer or internal reporting.
`RT`	Right side	Use to indicate laterality when required by payer or internal reporting.
`59`	Modifier `XS` (Separate structure)	Use `XS` when the service is performed on a separate structure or organ system and distinct from other services that day.

Taxonomy Code	Specialty	Notes
`207L00000X`	Orthopedic Surgery	Orthopedists commonly perform image-guided arthrocentesis for large-joint effusions.
`207R00000X`	Sports Medicine	Sports medicine physicians perform diagnostic and therapeutic joint aspirations and injections.
`2084P0221X`	Physical Medicine & Rehabilitation	PM&R specialists perform joint aspirations and inject therapeutic agents for pain management.
`208000000X`	Family Medicine	Family physicians in outpatient or urgent care settings frequently perform arthrocentesis.
`208D00000X`	Emergency Medicine	Emergency physicians perform urgent arthrocentesis for suspected septic arthritis.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`M25.561`	Pain in right knee	Common presenting symptom prompting diagnostic or therapeutic knee arthrocentesis.
`M25.562`	Pain in left knee	As above for the contralateral knee.
`M00.9`	Pyogenic arthritis, unspecified	Suspected septic arthritis is a primary indication for diagnostic arthrocentesis and synovial fluid analysis.
`M65.861`	Other synovitis and tenosynovitis, right wrist	Joint effusions in other major joints may require arthrocentesis.
`M06.9`	Rheumatoid arthritis, unspecified	Inflammatory arthritides commonly lead to effusions and diagnostic aspiration.
`M15.9`	Polyosteoarthritis, unspecified	Osteoarthritic effusions sometimes require aspiration for symptom relief or diagnostic evaluation.
`M14.9`	Crystal arthropathy, unspecified	Gout or pseudogout evaluation often requires synovial fluid analysis for crystals.
`R22.0`	Localized swelling, mass and lump, head	(Note: This code is less typical for joint aspiration but included to illustrate swelling codes; select clinically appropriate joint swelling codes.)

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`76942`	Ultrasonic guidance for needle placement (e.g., biopsy, aspiration, injection), imaging supervision and interpretation	Often billed when real-time ultrasound guidance is used for needle placement; `76942` may be reported by the imaging provider or included depending on payer policy and who performs and documents the guidance.
`20610`	Arthrocentesis, aspiration and/or injection, major joint or bursa (e.g., shoulder, hip, knee) without ultrasound guidance	Represents the non-image-guided version of the service; used when ultrasound guidance is not performed.
`99000`	Handling and/or conveyance of specimen for transfer from the office to a laboratory	Used when separate specimen handling fee is billed for synovial fluid sent to external lab (payer-specific acceptance varies).
`88112`	Cytopathology, fluids, except breast, each additional single or multiple cell block(s) (may vary by lab)	Example of lab/cytology code that may be associated with synovial fluid analysis (billed by the lab rather than the clinician).
`20612`	Arthrocentesis, aspiration and/or injection, major joint or bursa, with injection of therapeutic agent and with ultrasound guidance, with permanent recording and reporting (if applicable per coding rules)	Related advanced guidance/injection code used in some contexts when both aspiration and injection with imaging are performed and payer recognizes the code.

CPT 20500: Sinus Tract Therapeutic Injection

CPT-20501-SINUS-TRACT-CONTRAST-INJECTION-DIAGNOSTIC

CPT 20501: Diagnostic Injection of Sinus Tract with Imaging Guidance

CPT-20520-FOREIGN-BODY-REMOVAL-MUSCLE-TENDON-SHEATH

CPT 20520: Removal of Foreign Body from Muscle or Tendon Sheath

CPT-20525-DEEP-FOREIGN-BODY-REMOVAL-MUSCLE-TENDON-SHEATH

CPT 20525: Deep Foreign Body Removal from Muscle or Tendon Sheath

CPT-20526-CARPAL-TUNNEL-INJECTION-SHORT-TERM-RELIEF

CPT 20526: Carpal Tunnel Injection for Short-Term Symptom Relief

CPT-20527-COLLAGENASE-INJECTION-DUPUYTRENS-CONTRACTURE

CPT 20527: Collagenase Injection for Dupuytren's Contracture

CPT-20550-TENDON-OR-LIGAMENT-INJECTION-APONEUROSIS-TREATMENT

CPT 20550: Tendon or Ligament Injection for Aponeurosis

CPT-20551-TENDON-ORIGIN-INSERTION-INJECTION

CPT 20551: Therapeutic Injection at Tendon Origin or Insertion

CPT-20552-TRIGGER-POINT-INJECTION-ONE-OR-TWO-MUSCLES

CPT 20552: Trigger Point Injection, One or Two Muscles

CPT-20553-TRIGGER-POINT-INJECTION-THREE-OR-MORE-MUSCLES

CPT 20553: Trigger Point Injection, Three or More Muscles

Showing 1–10 of 41

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`25`	Significant, separately identifiable E/M service by the same physician on the same day	Use when a distinct evaluation and management visit is performed the same day as the procedure and documented separately.
`59`	Distinct procedural service	Use when this arthrocentesis is separate and not part of another service on the same day (select carefully per NCCI).
`76`	Repeat procedure by same physician	Use when the same procedure is repeated later the same day by the same provider.
`77`	Repeat procedure by another physician	Use when the same procedure is repeated by a different physician the same day.
`26`	Professional component	Use if billing separates the professional component when the facility bills technical component (rare for office-performed procedures).
`TC`	Technical component	Use if only the technical component is billed by the facility or imaging service (applicable when ultrasound recorded by another entity).
`59` (alternative)	Modifier `XU` (Unusual non-overlapping service)	Use `XU` only where applicable and supported by payer policy to indicate distinct service (use per payer guidance).
`52`	Reduced services	Use when the procedure is partially reduced or not completed as documented.
`53`	Discontinued procedure	Use when the procedure is started but discontinued due to extenuating circumstances.
`22`	Increased procedural services	Use when the work required is substantially greater than typical and well-documented.
`JZ`	Zero days of observation/hospital inpatient only	Use per payer rules when applicable to observation status billing (payer-specific).
`LT`	Left side	Use to indicate laterality when required by payer or internal reporting.
`RT`	Right side	Use to indicate laterality when required by payer or internal reporting.
`59`	Modifier `XS` (Separate structure)	Use `XS` when the service is performed on a separate structure or organ system and distinct from other services that day.

Taxonomy Code	Specialty	Notes
`207L00000X`	Orthopedic Surgery	Orthopedists commonly perform image-guided arthrocentesis for large-joint effusions.
`207R00000X`	Sports Medicine	Sports medicine physicians perform diagnostic and therapeutic joint aspirations and injections.
`2084P0221X`	Physical Medicine & Rehabilitation	PM&R specialists perform joint aspirations and inject therapeutic agents for pain management.
`208000000X`	Family Medicine	Family physicians in outpatient or urgent care settings frequently perform arthrocentesis.
`208D00000X`	Emergency Medicine	Emergency physicians perform urgent arthrocentesis for suspected septic arthritis.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`M25.561`	Pain in right knee	Common presenting symptom prompting diagnostic or therapeutic knee arthrocentesis.
`M25.562`	Pain in left knee	As above for the contralateral knee.
`M00.9`	Pyogenic arthritis, unspecified	Suspected septic arthritis is a primary indication for diagnostic arthrocentesis and synovial fluid analysis.
`M65.861`	Other synovitis and tenosynovitis, right wrist	Joint effusions in other major joints may require arthrocentesis.
`M06.9`	Rheumatoid arthritis, unspecified	Inflammatory arthritides commonly lead to effusions and diagnostic aspiration.
`M15.9`	Polyosteoarthritis, unspecified	Osteoarthritic effusions sometimes require aspiration for symptom relief or diagnostic evaluation.
`M14.9`	Crystal arthropathy, unspecified	Gout or pseudogout evaluation often requires synovial fluid analysis for crystals.
`R22.0`	Localized swelling, mass and lump, head	(Note: This code is less typical for joint aspiration but included to illustrate swelling codes; select clinically appropriate joint swelling codes.)

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`76942`	Ultrasonic guidance for needle placement (e.g., biopsy, aspiration, injection), imaging supervision and interpretation	Often billed when real-time ultrasound guidance is used for needle placement; `76942` may be reported by the imaging provider or included depending on payer policy and who performs and documents the guidance.
`20610`	Arthrocentesis, aspiration and/or injection, major joint or bursa (e.g., shoulder, hip, knee) without ultrasound guidance	Represents the non-image-guided version of the service; used when ultrasound guidance is not performed.
`99000`	Handling and/or conveyance of specimen for transfer from the office to a laboratory	Used when separate specimen handling fee is billed for synovial fluid sent to external lab (payer-specific acceptance varies).
`88112`	Cytopathology, fluids, except breast, each additional single or multiple cell block(s) (may vary by lab)	Example of lab/cytology code that may be associated with synovial fluid analysis (billed by the lab rather than the clinician).
`20612`	Arthrocentesis, aspiration and/or injection, major joint or bursa, with injection of therapeutic agent and with ultrasound guidance, with permanent recording and reporting (if applicable per coding rules)	Related advanced guidance/injection code used in some contexts when both aspiration and injection with imaging are performed and payer recognizes the code.

CPT 20500: Sinus Tract Therapeutic Injection

CPT-20501-SINUS-TRACT-CONTRAST-INJECTION-DIAGNOSTIC

CPT 20501: Diagnostic Injection of Sinus Tract with Imaging Guidance

CPT-20520-FOREIGN-BODY-REMOVAL-MUSCLE-TENDON-SHEATH

CPT 20520: Removal of Foreign Body from Muscle or Tendon Sheath

CPT-20525-DEEP-FOREIGN-BODY-REMOVAL-MUSCLE-TENDON-SHEATH

CPT 20525: Deep Foreign Body Removal from Muscle or Tendon Sheath

CPT-20526-CARPAL-TUNNEL-INJECTION-SHORT-TERM-RELIEF

CPT 20526: Carpal Tunnel Injection for Short-Term Symptom Relief

CPT-20527-COLLAGENASE-INJECTION-DUPUYTRENS-CONTRACTURE

CPT 20527: Collagenase Injection for Dupuytren's Contracture

CPT-20550-TENDON-OR-LIGAMENT-INJECTION-APONEUROSIS-TREATMENT

CPT 20550: Tendon or Ligament Injection for Aponeurosis

CPT-20551-TENDON-ORIGIN-INSERTION-INJECTION

CPT 20551: Therapeutic Injection at Tendon Origin or Insertion

CPT-20552-TRIGGER-POINT-INJECTION-ONE-OR-TWO-MUSCLES

CPT 20552: Trigger Point Injection, One or Two Muscles

CPT-20553-TRIGGER-POINT-INJECTION-THREE-OR-MORE-MUSCLES

CPT 20553: Trigger Point Injection, Three or More Muscles

Showing 1–10 of 41

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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CPT 20611: Ultrasound-Guided Arthrocentesis of Major Joint or Bursa

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Billing Code Overview

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CPT 20611: Ultrasound-Guided Arthrocentesis of Major Joint or Bursa

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References